Puzzle 1: What number or numbers comes next in this series?
Answer: 7777777.
Solution: 1 ones
2 twos
3 threes
4 fours
5 fives
6 sixes and
7 sevens
Puzzle 2: Suppose today is Thursday. What day of the week will it be 19 days from today?
Answer: Tuesday.
Solution: It will be Tuesday. Each week has 7 days, so it will be Thursday again in 21 days and 2 days before that will be Tuesday.
Puzzle 3: What is the odd one out?
Solution: The odd one out is 78. It is 39 x 2. The other numbers are all evenly divisible by 37.
Puzzle 4: What is the factorial of 5?
A. 1
B. 60
C. 120
D. 180
Answer: C – 120
Solution: 120 (5 X 4 X 3 X 2 X 1).
Puzzle 5: The average of three numbers is 29. The average of two of these numbers is 38. What is the third number?
Answer: 11.
Solution: 3 numbers 29 x 3 = 87 total
2 numbers 38 x 2 = 76 total
The third number must therefore be 87 – 76 = 11.
Puzzle 6: Can you determine the missing number in the box? The same rule of logic applies to all three boxes.
Solution: The missing number is 24. The rule is to double the first number in each rectangle and place that number in the next box below it.